Aqua rite chlorine generator control panel

i have an t-9 cell generator and a aqua rite gold line control board. I noticed my salt reading had no changed in 3 weeks even with lots of recent rain. I checked out the control board and all the diagnostic reading work except salt reading. When I scroll thru diagnostics and get to "actual" salt reading there is a - 0. I also noticed that every 2-3 minutes the green power and generating lights go off then come back on in about a minute. I inspected cell looks good and clean checked all wiring looks good too. Not sure if it's the circuit board. Generator Or sensor and don't know where to begin for testing any of these. I have " reset" the system by shutting off breaker and then back on. HELP?!?!